%I #9 Jan 12 2024 14:09:55
%S 1,48,3840,86016,983040,34603008,22900899840,805306368,1095216660480,
%T 27419071217664,181419418583040,1213860837064704,384213343210045440,
%U 13510798882111488,31345053406498652160
%N Denominator of Bernoulli(2n,1/4).
%H <a href="/index/Be#Bernoulli">Index entries for sequences related to Bernoulli numbers.</a>
%t BernoulliB[2*Range[0,20],1/4]//Denominator (* _Harvey P. Dale_, Jan 12 2024 *)
%K nonn
%O 0,2
%A _N. J. A. Sloane_.